Clamping machine



June 6, 1933. w. K. M NAIR 2,

CLAMPING MACHINE Filed March 23, 1932 2 Sheets-Sheet 1 japan/tor June 6, 193? w K. M NAIR 1,912,989

' CLAMPING MACHINE Filed March 25, 1952 2 Sheets-Sheet 2 7 liven/Z017 Whiz/7v 773 72666),

@WJJMWI a easants e, 1933 y it --U E S A ES-P T NT OFFICE K.MON-A 3;dQF dIiOQ tl i iM NESOTA, Assxenoa'ro E NORTHWEST 1 mins COMZPANY, on oil-enemy nin'nnsomAgA coRPoaATIoN oe minnnsomx snail/isms MACHINE Application fii a March 23, m asure-m. 600,810. a

The present invention relates to clamping methodsfiand device's, andfparticularly to a? device called a heaclen, gijAlthough the device f-may have numerous uses it is specially adapted jfonclamping a; CYliHdiiCZIlfTOll;8nd.-

wise. The preferred embodiments a s here- 1 inafter describedi s specially adapted for 1 0113 01: spools, in whiohftherellisan axial here, such aslisf found in a roll of paper IQ? woundon a hollow core,or a tube Inasmuch as the inventionhasbeen developed with refce t aproblem encountered in wrapping of paper With a" PTOT/eQt'lV6COVflf1ng'1t Wil be d scribed with reference to thatprob lein, without any intention to limitto that Y field thegutility or; the construction of devices embodying the invention tw large and heavy rolls of the material are l i In the manufacture ofpaper and like sheets formed. Ordinarily suchrolls are wonndon V hollowv cores of tubular structure; Such rolls may he moved about bv overhead: cranes have ing tongs or equivalent devices, the free ends a r a of which are I inserted v nto the ,hollow core. They are also moved about by rolhng jaaslon' the floor HWhere high grade 1p apers areused, care nmst bGxGXBIClSBd {LQ keep the paper "clean,

Where theloaper is cnt toa presoribed width for special use,oare must bejexercised to proteCt'the edge of the (roll; For example, a i rollshould notbe plaeeclgon its endfforjinso placing it, orinplacing itonits side from an endwiseposition, as; may be done manually,

the edge bears the weight of the roll, ;and

paperisthus damaged at the edge for a conjsiderahledistanceintothe rollfl a i Where such heavy rolls iLIGtOCbE} wrapped,

they v rnaybe set down horizontally; as by a crane, onto a wrapping sheet and then rolled @sothat the wrapper nay picked up and iewed labou tit, leaving projecting endsof theWrapper; to be turned over on the ends.

It a custom toplace asealing discof paper, such asa label over the turned-inendotthe '53 ra per at eachend of the roll. To dothisf pressure is applied againstsuch a disc on; the

end. 1

a H mme ployed so to' seal the wrapper on such rolls; Q istoinovethe roll into a heavy location such rolls must be moved; The other together, to "lock them i in a; Clamping action on the ends of the mne a thento releasethe simplelnlatewith a standard for holding it machine between two clamping members.

the rolls with a minimum of time, labor and expense, without injury to the roll; to head the rolls wherever theymaybe tohe ad rolls ofany length; and totlispense withthenecessity for a large, heavy, costly andiper-jd manently located slow-operating, power-con sulning machine. it

Qne Object of the invention is prepared roll between two portable substa11- t fally verticalplatesfihen to draw the plates y Another ohjectof the invention isthe provision of one, and preferably two portable so jilateswliicli are separable, and to clamp:

them together witha roll between them, by means; of; a single tension member passing througl'i the" hollow center of the roll.

stillfanother object is to provide a quickaetihg'leverfior operating handle for bringing the platesinto clamping engagement with a roll, a A Still-another object is the provision ofija substantially vertical when it isidle. j

Another object offthe invention is the provisionof a plate having a castor or similar wheeling construction associated with it to facilitate moving it from placeto place. Variousotherfand ancillary objeotsfand advantages of theinvention willbe apparent from the following description of the invenw' t'ion made-in referenceto the accompanying drawings showing an illustrative embodiment 0" is used for heavy rolls of paper.

of the invention and the manner inwwhich it In the drawings Fig. 1 illustrates a roll of paper, wrapped and sealed in a usual manner, and it is such a roll as the described device is designed to form.

Fig. for use.

Fig. 3 is a lines3 3 of Fig. 2 and of Fig. 3.

Fig. 4 is a view of the outside of a plate as positioneu in Fig. 2.

Fig. 5 is a plan view of the parts of Fig. 2, after moving into clamping engagement. v

Fig. (3 is a front elevation of the shown in Fig. 5,illustrating the operating lever in looking position.

is a front elevation of the devic-eset Fig. 7 is a perspective view of a suitable operating lever.

Fig. 8 is a perspective view of an adjusting wedge.

Fig. 9 is a view of a modified operating lever having a rolling ring for a cam.

Fig. lOis a cross-section on line 10-10of Fig. 9showing the roller-bearing cam.

In Fig.1 the'roll shown has a hollow core A wrapper 11 has its ends turned over in folds 12 over which is a seal or header 1,3 adhesivelv united to the folds. A supplementary sticker l4is shown merely for the purpose of covering a hole 15 in the header caused by use of the device described. This sticker is not at all'necessary, but it prevents presentation of any torn edges of paper.

A plate 16 may be formed of wooden planks suitably held together. At the'bottom it carries brackets 17 and 18 which bear a wheel axle 19 carrying rollers some 21. Thebrackets and rollers are so located that when the plate is vertical the rollers are off the floor, and so that when .therollers are on the floor the plate leans outwardly to a slight extent. Any suitable'handle such as two pegs 22 and 23 may be provided. By-holding such handles the plate may be readily wheeled about. Two similar plates a-reused .in the preferred embodiment, so that both plates may be moved about with a maximum of convenience.

Where the lates are clamped with a siiwle I ."t tension member, as can conveniently. be done 1 with a roll which has a hollow center tho the tension bar for different sizes of rolls.v

The slot 25 in wood is preferably protected from .wear by the provision of a durable metal plate 26 onthe outside; On the inside theslot'2 5 flares outwardly and the sides are protected with durable metal. parts 27 and 28 .forming slot 32 on each end. I made as duplicates to facllltate using either cross-section of a plate on the bar 30 with a series of detent recesses such as holes 31 along its length, and a hook- The ends are I a height dictated by the size of a roll, and to project from each plate. The operating end 33 (Fig. 6) is close to one plate, and the holding end 34 may project without limitation. The holding end is fixed initially by means of apin 35 through a hole 31. As clamping is effected, slack space is provided between the pin andthe plate, and an operator then slides a forked wedge-36 between the pin and plate, and over the bar. The surface of the wedge 36 is preferably stepped as shown at 37 (Fig. 8), but this is not necessary where a sufficiently pointed wedge is used. The wedge preferablyhas'two parts to encompass the bar, and a forked form is desirable to facilitate easy insertion and removal.

The operating end 33 has an operating device comprising a handle or lever 40 and a cam head 41. The cam is forked to encompass the bar 30, which enters space 42. Across space 42 is a fixed axis or pin 43 which may easily move into the hook-forming slot 32 in the tension bar. The cam surface 44 is substantially eccentric about the pin 43. When the lever 40'is near the vertical (full lines in Fig. 6)fthe cam surface and hence the plate may be nearer the pin 43. As the lever is moved toward the horizontal (dotted line position in Fig. 6) s the cam surface is more remote from the pin and forces the plate away from the pin, thus putting tension on the bar. A flat spot 45 is desirable on the cam surface so that it serves to hold the parts in a sub stantially locked position when pressure is applied on the roll. Thus locked, the roll may be left clamped and the operator is free.

In Fig. 9 a modified cam construction is shown in which the cam surfaces 44 of Fig. 7 are formed by rings 48 having a roller-bearing relation to the heads 49 and 50 on the forked lever 51. A functional flat spot 52 is also provided. I v

In paper mills where many rolls are delivered to a shipping'room, these may be alined on a floor by a crane for rolling forward in succession. As each is rolled forward on the floor over a wrapper, the wrapper 11 may be wound on the roll. Then the end folds 12 are formed, and a pasted header or seal 13 may be placed loosely over the folds, or the folds may be cemented without such a seal or header. The'last operation may be per formed just before the roll enters the space between the two plates, or even while the roll closer together. He then lessens the operating pressure, and the firstoperator m'ayplace adevice, such as wedge 36-either in placeor moves it to alower positionon the bar. Th en the lever may be operatedagain to give the i, ifillmll'squezve- -T e pasted label or1header,or

end, is allowed to set for a very shortperiod,

when the parts may be released, the bar'withdrawn, and the finished roll rolled away.

If desired, a suitable wedge may be used between the cam and theplate, thus permitting one operator to make all themovements necessary for operating the device. The wedge may be dispensed with byproviding a j camwhich permits all the play necessary for w I operating the device. The spacing of the of using the wedge. v r

The device does not require any setting or adjustment for a particular size of roll, ex cept the movement of pin '35. It maybe holes in the bar bears upon the desirability used ondifilerent sized rolls (either in length or diameter) 111, SUCCGSSIOILWltllOHt 1nconvenience. It may be moved about as desired,

to operate. i y x Although the deviceparticularly described has a single tension bar, and this is used is quicker in operation than known power machines, and 1s much cheaperto build and i plate,and an operating device at the other plate effectively secured to said bar and adapted to move the plate along thebar towards the opposing plate. a i

2. A- clamping device comprising in combination two plate members, a bar adapted to beconnected for tension to each I member,

means to secure thebar in fixed connection to one plate,and an operating ClQVlCGTOl securing the adjustably to theother plate, whereby the adjustable connection effects a clamping action between the plates.

3. A'Iclamping devicecomprising eomi bination two slotted plates, a long bar adaptedto enter both slots, saidbar having periodic detent recesses therein, locking means adapted to engage in one of said detent recesses to secure the bar intension to one plate, andan operating device adapted to engage one of said detent recesses at the other plate and adjustably secure said bar and saidother plate in-tension, the adjust;

able securing being effective as clamping actionk U i I i In testimony whereof I have hereunto affixed my signature. a

i WILLIAM K. MoNAIR.

within the area of the plates, it isto be understood that this is merely illustrative, and is a simple preferred form for rolls which are hollow. For other types of rolls, or other forms, it is to be understood that numerous changes can be made without departing from the invention.

- Although it has been described with reference to rolls of paper, it may beused without change'for rolls of cloth carpeting, andthe like, when a hollow center is available. For

"these and for other other forms, obvious changes can be made without departing from the spirit and scope of the invention as expressed in the appended claims.

I claim:

1. A clamping device comprising in combination two independent clamping plates, supports for each plate to maintain them substantially vertical, each plate being slotted in-a vertical direction, a tension bar 1 adapted to pass through the slots, locking means tosecure the bar in tension at one rise 

